Love the finished article. It's nice when you get the opportunity to make something you can feel proud of at the end - all too often there are compromises of time or money or just life getting in the way.
Oiler looks great - not as good as the custom res mind. Would be interested to know how it's connected up and whether the coolant actually flows through the external tubing by the feet....just for curiosity
The range of colours works well too. Did look at first like it might be a bit monochromatic but now it's all together it all balances nicely.
The cabling is the only problem with a steampunk build. You've done brilliantly at hiding most of it but the ATX and PCIE cables aren't really optional. Don't get me wrong, I'm not saying they're bad, I was just trying to think if they could be done in any way that would complement the theme rather than trying to hide them. I had a think about waxed sleeving but I couldn't really find much on it.
This page has the sort of look I was thinking of.
The only other thing I could think of that would look 'vintage' is probably massively unwieldy when it comes to 24-cable bundles but they used to use twisted flex back in the day. Something like
this.
